Merge pull request #4510 from Honza-m/master

Fix #4225 - virtualenv name when PIPENV_PYTHON set to filepath

news/4225.bugfix.rst

@@ -0,0 +1 @@
+Fix a bug where setting PIPENV_PYTHON to file path breaks environment name

pipenv/project.py

@@ -443,7 +443,13 @@ class Project(object):
     def virtualenv_name(self):
         # type: () -> str
         sanitized, encoded_hash = self._get_virtualenv_hash(self.name)
-        suffix = "-{0}".format(PIPENV_PYTHON) if PIPENV_PYTHON else ""
+        suffix = ""
+        if PIPENV_PYTHON:
+            if os.path.isabs(PIPENV_PYTHON):
+                suffix = "-{0}".format(os.path.basename(PIPENV_PYTHON))
+            else:
+                suffix = "-{0}".format(PIPENV_PYTHON)
+
         # If the pipfile was located at '/home/user/MY_PROJECT/Pipfile',
         # the name of its virtualenv will be 'my-project-wyUfYPqE'
         return sanitized + "-" + encoded_hash + suffix